Chemical Changes And Structure #3: Atomic Bonds
No description yet. This curated deck is ready for daily study.
Card preview (24)
What can atoms be joined together by?
Bonds
How is a molecule formed?
When two or more atoms join together
What happens when two or more of the same atoms join together?
They make a molecule of an element
What are diatomic molecules made up of?
Only 2 atoms
How many diatomic elements are there?
7
What are the 7 diatomic elements?
Oxygen, Fluorine, Chlorine, Nitrogen, Hydrogen, Iodine, Bromine (Our Friend Claire Needs Her Irn Bru)
Why do atoms bond?
To achieve the most stable outer electron arrangement- a full outer shell
What is a covalent bond?
Two positive nuclei held together by their common attraction for the shared pair of negative electrons
What are covalent bonds usually formed between?
Two non-metal elements
How do you break a covalent bond?
You need a LOT of energy as they are very strong forces of attraction
How are double or triple bonds formed?
When two or three electrons join another 2 or 3 electrons to pair up
What is an example of chemical formula?
HCl or H20
What is an example of full structural formula?
H - Cl or H - O - H
How many dimensions do molecules exist in?
3
What does the shape of simple covalent molecules depend on?
The number and orientation of bonds around the central atom
How can we show the shape of a molecule?
By using perspective drawings
What is the perspective of a straight bond?
In the plane of the paper (flat)
What is the perspective of a wedge bond?
Coming towards you
What is the perspective of a dashed bond?
Going away from you
Linear molecules are bonded by…
1 straight bond
Angular molecules are bonded by…
Bonded by 2 straight bonds
Trigonal Pyramidal molecules are bonded by…
One straight, wedged, and dashed
Tetrahedral molecules are bonded by…
2 straight, 1 wedge, 1 dashed
How many atoms in a linear molecule?
2